Free Alibaba ACA-Cloud1 Exam Actual Questions

The questions for ACA-Cloud1 were last updated On Mar 26, 2025

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Question No. 1

Which of the following is not the database type supported by RDS?

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Correct Answer: D

RDS (Relational Database Service) is a fully managed online database service that supports various database engines, such as MySQL, SQL Server, PostgreSQL, MariaDB, and PPAS (PostgreSQL with Oracle compatibility)1.However, RDS does not support Oracle database, which is a proprietary database system developed by Oracle Corporation2.If you need to use Oracle database on Alibaba Cloud, you can deploy it on an ECS instance or use the Oracle Database Backup Service3.


Question No. 2

You can retrieve data directly from an ECS Image and use it right away.

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Correct Answer: B

An ECS image is a copy of data from one or more disks that are attached to an ECS instance. You cannot retrieve data directly from an ECS image and use it right away. You need to create an ECS instance from the image first, and then access the data on the disks of the instance.Reference:Elastic Compute Service:Image overview


Question No. 3

You can an ECS instance's configuration. (Choose two.)

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Correct Answer: A, B

You can upgrade or downgrade an ECS instance's configuration to meet your business needs. Upgrading an instance's configuration means increasing the vCPUs, memory, bandwidth, or disk capacity of the instance. Downgrading an instance's configuration means decreasing the vCPUs, memory, bandwidth, or disk capacity of the instance.You can change the configuration of an ECS instance by using one of the following methods1:

Change the instance type: You can change the instance type of an ECS instance to adjust the vCPUs and memory of the instance.You can change the instance type of an ECS instance in the following scenarios2:

The instance is in theStoppedstate and uses apay-as-you-gobilling method.

The instance is in theRunningstate and uses asubscriptionbilling method, and the new instance type belongs to the same instance family as the original instance type.

Change the bandwidth configuration: You can change the bandwidth configuration of an ECS instance to adjust the network performance of the instance.You can change the bandwidth configuration of an ECS instance in the following scenarios3:

The instance is in theStoppedstate and uses apay-as-you-gobilling method, and the instance is not associated with an EIP.

The instance is in theRunningstate and uses asubscriptionbilling method, and the instance is not associated with an EIP.

Change the system disk or data disk: You can change the system disk or data disk of an ECS instance to adjust the disk capacity or performance of the instance.You can change the system disk or data disk of an ECS instance in the following scenarios4:

The instance is in theStoppedstate and uses apay-as-you-gobilling method, and the disk is not encrypted.

The instance is in theRunningstate and uses asubscriptionbilling method, and the disk is not encrypted.Reference:1:Overview of instance configuration changes - Alibaba Cloud2:Change the instance type of an ECS instance - Alibaba Cloud3:Change the bandwidth configuration of an ECS instance - Alibaba Cloud4:Change the system disk or data disk of an ECS instance - Alibaba Cloud.


Question No. 4

RDS for MySQL is a PaaS, which means after creating the RDS instance, the user does not need to take care of the underlying OS, runtime environment of software packages. These would be taken care of by Alibaba Cloud.

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Correct Answer: A

RDS for MySQL is aPlatform as a Service (PaaS)product that provides a complete database solution on Alibaba Cloud. It is fully compatible with MySQL and supports various MySQL features, such as transactions, views, triggers, stored procedures, and functions. RDS for MySQL frees users from the tasks of managing the underlying operating system, runtime environment, and software packages. Users only need to focus on their business logic and data. Alibaba Cloud takes care of the database installation, configuration, backup, recovery, monitoring, scaling, and security.Reference:MySQL Database Concepts and Operations - Alibaba Cloud Academy,Alibaba RDS Course | Cloud Academy,ACA Cloud Computing Certification - Alibaba Cloud Academy


Question No. 5

Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs.

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Correct Answer: A

Alibaba Cloud CDN can directly accelerate the access to the files stored in OSS and reduce OSS traffic costs. Alibaba Cloud CDN is a global network of points of presence (POPs) that are distributed across the globe. Alibaba Cloud CDN serves to reduce back-to-origin traffic. This in turn prevents network congestion and reduces latency.If you use Alibaba Cloud CDN to accelerate access to OSS, you can benefit from the following advantages1:

Improved user experience: Alibaba Cloud CDN caches the files stored in OSS to the POPs that are nearest to the users. This reduces the distance that the files need to travel and improves the access speed and user experience.

Reduced OSS traffic costs: Alibaba Cloud CDN reduces the number of requests that are sent to OSS. This reduces the OSS traffic costs and the load on the OSS servers.

Enhanced security: Alibaba Cloud CDN supports HTTPS secure acceleration and anti-leech protection. This ensures the security and integrity of the files stored in OSS.Reference:Use Alibaba Cloud CDN to accelerate access to OSS


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